43440543607 has 4 divisors (see below), whose sum is σ = 43441203736. Its totient is φ = 43439883480.

The previous prime is 43440543583. The next prime is 43440543637. The reversal of 43440543607 is 70634504434.

It is a happy number.

43440543607 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43440543607 - 2²⁷ = 43306325879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43440543607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43440543637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218868 + ... + 367129.

It is an arithmetic number, because the mean of its divisors is an integer number (10860300934).

Almost surely, 2^43440543607 is an apocalyptic number.

43440543607 is a deficient number, since it is larger than the sum of its proper divisors (660129).

43440543607 is an equidigital number, since it uses as much as digits as its factorization.

43440543607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660128.

The product of its (nonzero) digits is 483840, while the sum is 40.

The spelling of 43440543607 in words is "forty-three billion, four hundred forty million, five hundred forty-three thousand, six hundred seven".